The story
- Proto-Indo-European*h₁ep-
- Proto-Indo-European*h₁éps
- Proto-Indo-European*h₁óp(i)
- Proto-Italic*op
- Latinob
- Latinob-
- Proto-Indo-European*sekʷ-
- Proto-Indo-European*sékʷetor
- Proto-Italic*sekʷōr
- Latinsequor
- Latinobsequor
- Latinobsequium
- Proto-Indo-European*h₃ed-
- Proto-Indo-European*h₃édosder.?
- Latinobsequiōsus
- Middle Englishobsequyous
- English todayobsequious
From Middle English obsequyous, from Latin obsequiōsus (“complaisant, obsequious”), from obsequium (“compliance”), from obsequor (“comply with, yield to”), from ob (“in the direction of, towards”) + sequor (“follow”) (cf. sequel).
Etymology from Wiktionary, CC BY-SA 4.0.